/Engine/Plugins/Online/SocketSubsystemEOS/Source/SocketSubsystemEOS/Public/SocketEOS.h
Multicast traffic is sent using the default interface, this allows to explicitly set the interface used to send outgoing multicast datagrams.
true if the call succeeded, false otherwise.
virtual bool SetMulticastInterface ( const [FInternetAddr](API\Runtime\Sockets\FInternetAddr) & InterfaceAddress )